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On Wed, 2011-08-24 at 13:11 +0200, Svante Signell wrote:

> A short follow-up question (mathgl). How to specify where configure.ac
> searches for include files, AC_CHECK_HEADER?

Well, it seems to be a little more complicated. AC_CHECK_HEADER
finds /usr/include/hdf5.h which includes /usr/include/H5public.h, which
includes mpi.h if H5_HAVE_PARALLEL is defined. mpi.h is not found at the
default directories, it is at /usr/lib/openmpi/include/ (from

On kfreebsd mpi.h seem to be in the system headers. Previously, at least
on Linux, it was supplied by lam4-dev, but that package is not available
for Hurd.

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